Extruding and cutting apparatus for plastic materials



June'5, 1945; G. A. BOLE ET AL EXTRUDING AND CUTTING APPARATUS FORPLASTIC MATERIALS Filed Aug. 18, 1943 2 Sheets-Sheet 1.

lllll June 1945- 5. A. BOLE ET AL 2,377,668

EXTRUDING AND CUTTING APPARATUS FOR PLASTIC MATERIALS Filed Aug. 18,1943 2 Sheets-Sheet 2 :JWUMM GEORGE A- DOLE MYRIL C. Bi. CDYAN f d hasi1 4 a Y) 1 hexraonrnelinp ourrmc arrm'ws i i -FOR PLASTIC MATERIALS emsA. sci, Myril c. shah, and

Harry E,

Co Van, Columbus, Ohio, minors to The Edward Orton Jr. CeramicFoundation, Columbus, 0hio;'a testamentary trust a e ,Application August 18,}943, Serial no. 499,150 scams. (Cl. 25 10 5) c i H c umn orcolumns transversely thereof into suitable This invention relatestoclay-extruding and cutting apparatus, having particularreference toimproved meansfor extruding oneor moreelay columns and simultaneouslytherewith transversely severing such'a column or columnsinto sections ofdesired length. i i i i While the apparatus forming the presentinvention may be usedin many different capacities, I it isparticularlyapplicable to the formation of moldable, clay blanks usedinthe manufacture of pyi'ometric cones. Such cones are employedfordetermining firingtemperatures in kilns in which ceramic bodies aresubjectedto heat: treatment.

Ordinarily, these cones comprise tri-sided pyram: idalbodies of claycomposition. The larger or base ends, of said conesareembedded inplaques and areplaced in the firing zone of a kiln: When theware attainsa desired state of maturity, the same may be noted. byythe fact; thatthe cones softenand deform; thus apprising the-kiln oper- 'atorofthe"attainedtemperature;i 1 a It has, been a common practice in themanufacture of such cones for operators to, take a small quantity oicone -forming material ,in a plastic V state, roll theplasticmaterialbyhand into cylindrical formand insertgthe same in.the 00116-1 viormingcavity of amold; Such operations have (required considerabletimeand; unless care was utilized/the mold cavities were not fllledlto therequired egree to formcones of uniform weight and dimensions.

In accordance with the present invention, we

, provide apparatus for producingreadily handled j plastic blanks, eachof whichhas greater volume than isn'ecessjary tocompletelyilll a moldcavity, so that the blanks maybe rapidly handled by operators duringthemanufacture of, such cones and when inserted into the cavity of amold, will produce a surplus of, material capable of being,

readily removed.

It is another object for the invention to provide Afiurtherfobiectis toDl'bi'ide a cone blank forming machine in which oneor morecolumns,oifplastic cone-forming materialare extruded on an endless belt, therebeing disposed "between the extruding machine and. 1 thematerial-receiving end of the beltan electrically actuated column,cutter, the belt being providedwith spacedgcom tacts so that uponmovementof the belt and the lengagementof the contacts with switchdevices, the said cutter willbe actuated to sever the collengths, thusforming blanks which may be read- Fora further understanding of theinvention,

reference is to be had to the following description andtheaccompanyingdrawings, wherein:

Fig. 1 is aside elevational view,; partly in vertical section, of a conehlankiorming machine Fig 5 is a perspective view of-the extrusion die.Referring more particularlyto the drawings,

dc-airing and extrusion mill, which maygbe of i Rig. Zis atop plan viewthereof;

in hich the present invention is embodied;

Fig. 3 is averti l transverse sectional view on theplanetindicated bythe JineIIL-IILofFig. 1;

; Fig. i is an enlarged sectional Qview on theline the numeral 10designatesthebed oia pugging,

any standard construction, As usual, the mill embodies a pugging sectionII, clay granulating or disintegrating section 12, the vacuum controlled tieairing section l3 and an extrusion sec- 1 vices 15, soarranged as to advance'plastic clay tion These sectionsareprovided withthe usualmotor driven 'augers-andclay workingde introduced into the topof the puggingsection, e1, in a isubstantlallylongitudinal directionthrough themachine and discharge the samein, one or more barsworcolumnsthrough outlet openings ll provided in, a detachable head or die I]located ,at the discharge endof the extrusion section ll.

Clay orother columns of plastic composition so produced arecharacterized by their complete homogeneity and uniform consistency;being free from. lumps, either hardor. soit,gso; that py ometric conesmade therefrom will-he uniform in their thermal response. Loca teidatthe discharge, umn extrusion section M is a cutterframe ii.

I This frame has mounted therein a pair of sole-- means fonsimplifyingthe operationsJofmolding noids I 9, one of which is arranged above thehead i! and the other below said head, Cooperative ,with the fieldwindings; oi thegsolenoidsisa-rectangular armature framerzli throughwhichsthw columns extruded from the head 'l'l are adapted A to pass; Theframe lljisformed with rearwardly disposed ears 2| with which isconnected the ends of a tensioned cutter-wire 21.? Threaded'devices 23cooperate with the when to maintain the latter under desiredtension; Thesolenoids are adapted to be alternately and automatically energizedthereby, raising and lowering the armature frame 20 and causing thecutter wire II to pass a transversely through the clay bars or columnsas end of the bar 0: 8:01,- L

aa'mcea spaced opposed solenoid coils stationarily carried by saidframe, anarmature cooperative with said coils and adapted to be actuatedthereby as the coils are alternately energized and deenergized. a cutterwire carried by said armatune and movable in unison therewith totransversely sever a column of plastic material discharged from anassociated extrusion machine, an endless belt on which, the lengths ofthe severed material are received, longitudinally spaced contactscarried by said belt contiguous to the side edges thereof, and movableswitch devices cooperative with said contacts and operable uponengagement therewith to energize said solenoid coils.

5. Apparatus for cutting extruded clay columns into blanks of suitablelength comprising a clayworking and extruding machine, said machinehaving an orificed discharge head from which a clay column in a plasticcondition is adapted to be continuously discharged, a frame stationarilymounted contiguous to the outer face of said head, stationary upper andlower solenoid coils carried by said frame, an armature common to bothcoils and adapted to be reciprocated by the alternate energizing anddeenergiz ing of said coils, the intermediate part of said armature being formed with an opening in registration with the outer face of thedischarge head of said extruding machine, a stationary support arrangedin said opening for the reception 01' a clay column issuing from saidhead, a cutting element carried by said armature movable across theouter face of said head to sever the clay column into blank-forminglengths, a longitudinally movable conveyor registering with said supportfor the reception of the severed blank lengths, longitudinally spacedcontacts carried by said conveyor, energizing circuits for said solenoidcoils, and switch devices mounted adjacent to said conveyor forengagement with said contacts, whereby to periodically energize anddeener'gize said circuits. GEORGE A. HOLE.

MYRIL C. SHAW.

HARRY E. C0 VAN.

